test: use spread object

test/fixtures/v8-coverage/spawn-subprocess-no-cov.js

@@ -1,5 +1,5 @@
 const { spawnSync } = require('child_process');
-const env = Object.assign({}, process.env, { NODE_V8_COVERAGE: '' });
+const env = { ...process.env, NODE_V8_COVERAGE: '' };
 spawnSync(process.execPath, [require.resolve('./subprocess')], {
   env: env
 });

test/fixtures/v8-coverage/spawn-subprocess.js

@@ -1,5 +1,5 @@
 const { spawnSync } = require('child_process');
-const env = Object.assign({}, process.env);
+const env = { ...process.env };
 delete env.NODE_V8_COVERAGE
 spawnSync(process.execPath, [require.resolve('./subprocess')], {
   env: env

test/parallel/test-child-process-env.js

@@ -26,12 +26,13 @@ const os = require('os');
 
 const spawn = require('child_process').spawn;
 
-const env = Object.assign({}, process.env, {
+const env = {
+  ...process.env,
   'HELLO': 'WORLD',
   'UNDEFINED': undefined,
   'NULL': null,
   'EMPTY': ''
-});
+};
 Object.setPrototypeOf(env, {
   'FOO': 'BAR'
 });

test/parallel/test-child-process-exec-env.js

@@ -45,7 +45,7 @@ if (!common.isWindows) {
   child = exec('/usr/bin/env', { env: { 'HELLO': 'WORLD' } }, after);
 } else {
   child = exec('set',
-               { env: Object.assign({}, process.env, { 'HELLO': 'WORLD' }) },
+               { env: { ...process.env, 'HELLO': 'WORLD' } },
                after);
 }
 

test/parallel/test-child-process-fork-no-shell.js

@@ -8,7 +8,7 @@ const expected = common.isWindows ? '%foo%' : '$foo';
 if (process.argv[2] === undefined) {
   const child = cp.fork(__filename, [expected], {
     shell: true,
-    env: Object.assign({}, process.env, { foo: 'bar' })
+    env: { ...process.env, foo: 'bar' }
   });
 
   child.on('exit', common.mustCall((code, signal) => {

test/parallel/test-child-process-spawn-shell.js

@@ -50,7 +50,7 @@ command.on('close', common.mustCall((code, signal) => {
 
 // Verify that the environment is properly inherited
 const env = cp.spawn(`"${process.execPath}" -pe process.env.BAZ`, {
-  env: Object.assign({}, process.env, { BAZ: 'buzz' }),
+  env: { ...process.env, BAZ: 'buzz' },
   encoding: 'utf8',
   shell: true
 });

test/parallel/test-child-process-spawnsync-shell.js

@@ -37,7 +37,7 @@ assert.strictEqual(command.stdout.toString().trim(), 'bar');
 
 // Verify that the environment is properly inherited
 const env = cp.spawnSync(`"${process.execPath}" -pe process.env.BAZ`, {
-  env: Object.assign({}, process.env, { BAZ: 'buzz' }),
+  env: { ...process.env, BAZ: 'buzz' },
   shell: true
 });
 

test/parallel/test-cli-node-options-disallowed.js

@@ -28,7 +28,7 @@ disallow('--v8-options');
 disallow('--');
 
 function disallow(opt) {
-  const env = Object.assign({}, process.env, { NODE_OPTIONS: opt });
+  const env = { ...process.env, NODE_OPTIONS: opt };
   exec(process.execPath, { cwd: tmpdir.path, env }, common.mustCall((err) => {
     const message = err.message.split(/\r?\n/)[1];
     const expect = `${process.execPath}: ${opt} is not allowed in NODE_OPTIONS`;

test/parallel/test-crypto-fips.js

@@ -71,7 +71,7 @@ testHelper(
   [],
   FIPS_DISABLED,
   'require("crypto").getFips()',
-  Object.assign({}, process.env, { 'OPENSSL_CONF': '' }));
+  { ...process.env, 'OPENSSL_CONF': '' });
 
 // --enable-fips should turn FIPS mode on
 testHelper(

test/parallel/test-env-var-no-warnings.js

@@ -7,7 +7,7 @@ if (process.argv[2] === 'child') {
   process.emitWarning('foo');
 } else {
   function test(newEnv) {
-    const env = Object.assign({}, process.env, newEnv);
+    const env = { ...process.env, ...newEnv };
     const cmd = `"${process.execPath}" "${__filename}" child`;
 
     cp.exec(cmd, { env }, common.mustCall((err, stdout, stderr) => {

test/parallel/test-fs-readfile-error.js

@@ -37,7 +37,7 @@ const fixtures = require('../common/fixtures');
 function test(env, cb) {
   const filename = fixtures.path('test-fs-readfile-error.js');
   const execPath = `"${process.execPath}" "${filename}"`;
-  const options = { env: Object.assign({}, process.env, env) };
+  const options = { env: { ...process.env, ...env } };
   exec(execPath, options, (err, stdout, stderr) => {
     assert(err);
     assert.strictEqual(stdout, '');

test/parallel/test-http-server-stale-close.js

@@ -44,9 +44,7 @@ if (process.env.NODE_TEST_FORK_PORT) {
   });
   server.listen(0, function() {
     fork(__filename, {
-      env: Object.assign({}, process.env, {
-        NODE_TEST_FORK_PORT: this.address().port
-      })
+      env: { ...process.env, NODE_TEST_FORK_PORT: this.address().port }
     });
   });
 }

test/parallel/test-https-agent-additional-options.js

@@ -63,7 +63,7 @@ function variations(iter, port, cb) {
         // Save `value` for check the next time.
         value = next.value.val;
         const [key, val] = next.value;
-        https.get(Object.assign({}, getBaseOptions(port), { [key]: val }),
+        https.get({ ...getBaseOptions(port), [key]: val },
                   variations(iter, port, cb));
       }
     }));

test/parallel/test-icu-data-dir.js

@@ -21,7 +21,7 @@ const expected =
 }
 
 {
-  const env = Object.assign({}, process.env, { NODE_ICU_DATA: '/' });
+  const env = { ...process.env, NODE_ICU_DATA: '/' };
   const child = spawnSync(process.execPath, ['-e', '0'], { env });
   assert(child.stderr.toString().includes(expected));
 }

test/parallel/test-module-loading-globalpaths.js

@@ -41,7 +41,7 @@ if (process.argv[2] === 'child') {
 
   const testFixturesDir = fixtures.path(path.basename(__filename, '.js'));
 
-  const env = Object.assign({}, process.env);
+  const env = { ...process.env };
   // Unset NODE_PATH.
   delete env.NODE_PATH;
 

test/parallel/test-net-connect-options-fd.js

@@ -15,7 +15,7 @@ tmpdir.refresh();
 
 function testClients(getSocketOpt, getConnectOpt, getConnectCb) {
   const cloneOptions = (index) =>
-    Object.assign({}, getSocketOpt(index), getConnectOpt(index));
+    ({ ...getSocketOpt(index), ...getConnectOpt(index) });
   return [
     net.connect(cloneOptions(0), getConnectCb(0)),
     net.connect(cloneOptions(1))

test/parallel/test-pending-deprecation.js

@@ -55,7 +55,7 @@ switch (process.argv[2]) {
 
     // Test the NODE_PENDING_DEPRECATION environment var.
     fork(__filename, ['env'], {
-      env: Object.assign({}, process.env, { NODE_PENDING_DEPRECATION: 1 }),
+      env: { ...process.env, NODE_PENDING_DEPRECATION: 1 },
       execArgv: ['--expose-internals'],
       silent: true
     }).on('exit', common.mustCall((code) => {

test/parallel/test-process-redirect-warnings-env.js

@@ -18,8 +18,7 @@ tmpdir.refresh();
 const warnmod = require.resolve(fixtures.path('warnings.js'));
 const warnpath = path.join(tmpdir.path, 'warnings.txt');
 
-fork(warnmod, { env: Object.assign({}, process.env,
-                                   { NODE_REDIRECT_WARNINGS: warnpath }) })
+fork(warnmod, { env: { ...process.env, NODE_REDIRECT_WARNINGS: warnpath } })
   .on('exit', common.mustCall(() => {
     fs.readFile(warnpath, 'utf8', common.mustCall((err, data) => {
       assert.ifError(err);

test/parallel/test-stdin-script-child.js

@@ -5,9 +5,9 @@ const assert = require('assert');
 const { spawn } = require('child_process');
 for (const args of [[], ['-']]) {
   const child = spawn(process.execPath, args, {
-    env: Object.assign({}, process.env, {
-      NODE_DEBUG: process.argv[2]
-    })
+    env: { ...process.env,
+           NODE_DEBUG: process.argv[2]
+    }
   });
   const wanted = `${child.pid}\n`;
   let found = '';

test/parallel/test-tls-env-bad-extra-ca.js

@@ -16,10 +16,11 @@ if (process.env.CHILD) {
   return tls.createServer({});
 }
 
-const env = Object.assign({}, process.env, {
+const env = {
+  ...process.env,
   CHILD: 'yes',
   NODE_EXTRA_CA_CERTS: `${fixtures.fixturesDir}/no-such-file-exists-🐢`,
-});
+};
 
 const opts = {
   env: env,

test/parallel/test-tls-env-extra-ca-file-load.js

@@ -25,7 +25,7 @@ if (process.argv[2] !== 'child') {
   }
 } else {
   const NODE_EXTRA_CA_CERTS = fixtures.path('keys', 'ca1-cert.pem');
-  const extendsEnv = (obj) => Object.assign({}, process.env, obj);
+  const extendsEnv = (obj) => ({ ...process.env, ...obj });
 
   [
     extendsEnv({ CHILD_USE_EXTRA_CA_CERTS: 'yes', NODE_EXTRA_CA_CERTS }),

test/parallel/test-tls-env-extra-ca-no-crypto.js

@@ -14,7 +14,7 @@ if (process.argv[2] === 'child') {
   fork(
     __filename,
     ['child'],
-    { env: Object.assign({}, process.env, { NODE_EXTRA_CA_CERTS }) },
+    { env: { ...process.env, NODE_EXTRA_CA_CERTS } },
   ).on('exit', common.mustCall(function(status) {
     // Client did not succeed in connecting
     assert.strictEqual(status, 0);

test/parallel/test-tls-env-extra-ca.js

@@ -32,11 +32,12 @@ const server = tls.createServer(options, common.mustCall(function(s) {
   s.end('bye');
   server.close();
 })).listen(0, common.mustCall(function() {
-  const env = Object.assign({}, process.env, {
+  const env = {
+    ...process.env,
     CHILD: 'yes',
     PORT: this.address().port,
     NODE_EXTRA_CA_CERTS: fixtures.path('keys', 'ca1-cert.pem')
-  });
+  };
 
   fork(__filename, { env }).on('exit', common.mustCall(function(status) {
     // Client did not succeed in connecting